Headroom.js is a lightweight, high-performance JS widget (with no dependencies!) that allows you to react to the user's scroll. The header on this site is a living example, it slides out of view when scrolling down and slides back in when scrolling up.

Why use it?

Fixed headers are a popular approach for keeping the primary navigation in close proximity to the user. This can reduce the effort required for a user to quickly navigate a site, but they are not without problems…

Large screens are usually landscape-oriented, meaning less vertical than horizontal space. A fixed header can therefore occupy a significant portion of the content area. Small screens are typically used in a portrait orientation. Whilst this results in more vertical space, because of the overall height of the screen a meaningfully-sized header can still be quite imposing.

Headroom.js allows you to bring elements into view when appropriate, and give focus to your content the rest of the time.

This component is not supported by OutSystems. You may use the discussion forums to leave suggestions or obtain best-effort support from the community, including from Daniel Martins who created this component.

What is bLazy? bLazy is a lightweight lazy loading image script (less than 1.2KB minified and gzipped). It lets you lazy load and multi-serve your images so you can save bandwidth and server requests. The user will have faster load times and save data loaded if he/she doesn't browse the whole page. For a full list of options, functions and examples go to the blog post: http://dinbror.dk/blog/blazy.